摘要
本研究以呼和浩特市平原区杨树(Populus)人工林为研究对象,开展杨树人工林生物量分布特征和碳计量参数研究,以期提高研究区杨树人工林生物量和碳储量的估算精度.通过对不同龄组的杨树人工林设置标准样地,研究分析标准木的不同器官生物量和林分生物量特征.结果表明:不同龄组杨树各器官生物量分配呈现一致趋势,均表现为树干>树根>树枝>树皮>树叶.不同器官生物量占整株生物量的百分比分别为:树干50.19%、树根17.79%、树枝14.72%、树皮11.40%、树叶5.90%;实测生物量转化与扩展因子(BCEF)为0.42 t.m-3、生物量扩展因子(BEF)为1.64、根茎比(R)为0.22、木材基本密度(WD)为0.25 t.m-3;通过实测碳计量参数和联合国政府间气候专门委员会(IPCC)缺省值计算得到的不同龄组林分生物量无差异,表明采用实测碳计量参数和IPCC缺省值均能较准确地计算呼和浩特市平原区杨树人工林的固碳特征.
Abstract
In this study,Populus plantation planted in the plain area of Hohhot was taken as the research object,the biomass distribution characteristics and carbon metering parameters of Populus plantation were studied,which was of great significance to improve the estimation accuracy of biomass and carbon storage of Populus plantation in this area.By setting standard sample plots in different growth stages(young forest,middle-aged forest,near-mature for-est,mature forest,over-mature forest),the biomass characteristics of different organs and stands of standard trees were studied and analyzed.The results showed that the biomass allocation of different organs of Populus showed a consistent trend,which was trunk>root>branch>bark>leaf.The biomass of different organs accounted for 51.65%,16.91%,14.15%,11.33%and 5.97%of the total biomass of Populus,respectively.The measured biomass conver-sion and expansion factor(BCEF)was 0.40 t.m-3,the biomass expansion factor(BEF)was 1.61,the root-to-stem ratio(R)was 0.20,and the wood basic density(WD)was 0.24 t.m-3.There was no difference in the biomass of different age classes calculated by the measured carbon measurement parameters and IPCC default values,indi-cating that the measured carbon measurement parameters and IPCC default values could accurately calculate the car-bon sequestration characteristics of Populus plantations in the plain area of Hohhot.
基金项目
内蒙古鄂尔多斯森林生态系统国家定位观测研究站运行项目()
NETL
NSTL
万方数据